Following a heart valve replacement 18 mos. ago, my meds were changed. The only new prescription I am taking is Metoprolol TAR, 50mg daily. Since that surgery, I have had severe insomnia. In addition, I often feel my heart beating in my chest and pulsing in my ears at night. My resting pulse rate is 56 to 62. The Cardiologist offers no help. Is it possible that this is from the Metoprolol? Is there a beta blocker that doesn’t produce these symptoms? Getting desperate!!!